A full decompilation and automatic security analysis of all contracts on the Ethereum and the Fantom blockchains. Updated hourly with new contracts uploaded to both networks. Analysis results by Dedaub.

Contract Library by Dedaub

_dex

_amountIn

_tokenIn

_tokenOut

getAmountOut

pair

amountOut

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

interface IDexHandler {
    function getAmountOut(
        address _dex,
        uint256 _amountIn,
        address _tokenIn,
        address _tokenOut
    ) external view returns (address pair, uint256 amountOut);
}

IDexHandler.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "IDexHandler.sol";

interface IBaseV1Factory {
    function getPair(
        address tokenA,
        address tokenB,
        bool stable
    ) external view returns (address);
}

interface IBaseV1Pair {
    function getAmountOut(uint256 amountIn, address tokenIn) external view returns (uint256);
}

contract SolidlyDexHandler is IDexHandler {
    constructor() {}

    function getPairAmountOut(
        address pair,
        address tokenIn,
        uint256 amountIn
    ) internal view returns (uint256 amountOut_) {
        if (pair != address(0)) {
            try IBaseV1Pair(pair).getAmountOut(amountIn, tokenIn) returns (uint256 amountOut) {
                amountOut_ = amountOut;
            } catch {}
        }
    }

    function getAmountOut(
        address _dex,
        uint256 _amountIn,
        address _tokenIn,
        address _tokenOut
    ) external view override returns (address pair, uint256 amountOut) {
        pair = IBaseV1Factory(_dex).getPair(_tokenIn, _tokenOut, false);
        amountOut = getPairAmountOut(pair, _tokenIn, _amountIn);

        address stablePair = IBaseV1Factory(_dex).getPair(_tokenIn, _tokenOut, true);
        uint256 stableAmountOut = getPairAmountOut(stablePair, _tokenIn, _amountIn);
        if (stableAmountOut > amountOut) {
            pair = stablePair;
            amountOut = stableAmountOut;
        }

        if (amountOut == 0) {
            pair = address(0);
        }
    }
}

0xee253dd44a91f490143801e62c8db9572041cf8a